package com.donger.common.security.mobile;

import com.donger.common.core.constant.SecurityConstants;
import lombok.Getter;
import lombok.Setter;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationEventPublisher;
import org.springframework.security.authentication.AuthenticationServiceException;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter;
import org.springframework.security.web.authentication.preauth.PreAuthenticatedAuthenticationToken;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * MobileAuthenticationFilter
 *
 * @author lhl
 */
public class MobileAuthenticationFilter extends AbstractAuthenticationProcessingFilter {
    private static final String SPRING_SECURITY_FORM_MOBILE_KEY = "com/donger/common/security/mobile";
    @Getter
    @Setter
    private String mobileParameter = SPRING_SECURITY_FORM_MOBILE_KEY;
    @Getter
    @Setter
    private boolean postOnly = true;

    @Getter
    @Setter
    private AuthenticationEventPublisher eventPublisher;
    @Getter
    @Setter
    private AuthenticationEntryPoint authenticationEntryPoint;


    public MobileAuthenticationFilter() {
        super(new AntPathRequestMatcher(SecurityConstants.MOBILE_TOKEN_URL, "POST"));
    }

    /**
     * 手机 登录请求处理
     * @param request
     * @param response
     * @return
     * @throws AuthenticationException
     * @throws IOException
     * @throws ServletException
     */
    @Override
    public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException, IOException, ServletException {
        // 必须为post 请求
        if (postOnly && !request.getMethod().equals(HttpMethod.POST.name())) {
            throw new AuthenticationServiceException(
                    "Authentication method not supported: " + request.getMethod());
        }

        String mobile = obtainMobile(request);

        if (mobile == null) {
            mobile = "";
        }
        mobile = mobile.trim();

        MobileAuthenticationToken mobileAuthenticationToken = new MobileAuthenticationToken(mobile);

        setDetails(request, mobileAuthenticationToken);

        Authentication authResult = null;
        try {
            authResult = this.getAuthenticationManager().authenticate(mobileAuthenticationToken);

            logger.debug("Authentication success: " + authResult);
            SecurityContextHolder.getContext().setAuthentication(authResult);

        } catch (Exception failed) {
            SecurityContextHolder.clearContext();
            logger.debug("Authentication request failed: " + failed);

            eventPublisher.publishAuthenticationFailure(new BadCredentialsException(failed.getMessage(), failed),
                    new PreAuthenticatedAuthenticationToken("access-token", "N/A"));

            try {
                authenticationEntryPoint.commence(request, response,
                        new UsernameNotFoundException(failed.getMessage(), failed));
            } catch (Exception e) {
                logger.error("authenticationEntryPoint handle error:{}", failed);
            }
        }

        return authResult;

//        return this.getAuthenticationManager().authenticate(mobileAuthenticationToken);
    }

    /**
     * 在参数中获取手机号
     *
     * @param request
     * @return
     */
    private String obtainMobile(HttpServletRequest request) {
        return request.getParameter(mobileParameter);
    }

    private void setDetails(HttpServletRequest request,
                            MobileAuthenticationToken authRequest) {
        authRequest.setDetails(authenticationDetailsSource.buildDetails(request));
    }
}
